Twitter has made another TV partnership deal, this time with the National Football League and in particular with its NFL Network. For the NFL the new deal it will enable fans to get customized NFL video content, created specifically for the Twitter platform, on PCs, tablets and mobile devices. The agreement marks Twitter's biggest sports-related commitment to date for its Amplify service. Amplify was formally unveiled last May as a way for Twitter, broadcasters and advertisers to capitalize on peoples' use of social media while they watch TV. Like Facebook, Twitter is pinning it hopes on advertisers looking to tap its member base of 200 million regular users. It is setting its sights on TV, the most lucrative advertising market, and playing up to media companies and major brands its appeal to viewers who use the 140-character messaging platform to discuss what they are watching. To date the program boost CBS, Viacom, AE Network and Bloomberg as clients.